Absence Submission Utility Bar Setup
You need to create a new Application when adding an Absence Submission utility bar.
Go to Setup > App Manager > New Lightning App > Setup the App Name, etc. > click Next
Add the Utility Item = Absence Submission > Next
Choose objects that you want to display in the new App you created. Then, click Next.
Select a User Profile for the new App. Then, click Save & Finish
After saving, the Absence Submission utility bar will display on the newly created App.
Click the Absence Submission utility bar located in the lower left part of the screen.
The Absence Submission will look like this.